Pyrographical tool.



H. M. HOLTON.

'PYROGRAPHIGAL TooL. APPLIGATIONIIILED SERT. 28, 1908.

` 936,720. Patented 001;. 12,1909.

HERBERT IVI. HOLTON, OF NEW YORK, N. Y.

PYROGRAPI-IICAL TOOL.

Specification of I-.etters Patent.

Patented Oct'. 12, 1909.

Application led. September 28, 1908. Serial No. 455,216.

To all 'whom t may concern:

Be it known that I, HERBERT M. HoL'roN, a citizen of the United States,residing in the borough of Bronx, inthe city, county, and State of NewYork, have invented certain new and useful Improvements in PyrographicalTools, of which the following is a clear, full, and exact description.

The invention relates to pyrographical devices, more particularly tothat class which is used in art work such as the burning of wood,leather and the like, and has for its purpose the production of a toolprovided with a handle that will keep cool with long and continuous use;a burning point that conserves its heat energy and an insulating handle,which prevents the heat from being conducted away from the point throughthe handle.

The invention accordingly consists in the features of construction,combination of elements, a selection of material and arrangement ofparts, which will be exemplified in the mechanism hereinafter describedand the scope of the application of which will be indicated in theclaims.

Referring to the accompanying drawing in which similar characters o freference indicate like parts throughout the several views, Figure l isa. longitudinal section through the tool. Figs. 2 and 3 are enlargeddetails of the burning point showing the graduated holes in the underhalf of the burning tool.

I employ the handle 1' and flexible tube 2 which may be connected to asource of fuel supply and a burning point 3. The handle l is providedwith a hollow core' 4 and adapted at one end to engage a burning point3. This handle is made out of a material that is a non-conductor ofheat, i'nelastic and ii-rm such as chalk, magnesia, fire clay, lava,etc. The peculiar adaptability oflthis material will be at once realizedfor it is possible to provide a means, to hold the burning point 3entirely outside of the handle l, as will be seen by referring to Fig.l. With this construction the metal cores heretofore used in the handles4of the tools are done away with, which eliminates that large, radiatingor cooling surface. The heat energy is conserved thereby in the burningpoint, and the heating of the handle prevented.

By referring more particularly to Figs. 2 and 3, which are enlargeddetails of the burning point 3, it will be seen that it is fashioned outof a tube of metal, one end being closed and drawn to a point 10 more orless 0E the center line of the tube. I do not wish to restrict myself tothis specific shape of point for any shape point may be used. In thewall of the tube away from the point 10 are disposed holes of severaldiameters, the larger holes being nearer the point 10. The object ofthese holes being particularly spaced and sized is as follows: Graduallyincreasing the size of the hole as they near the point provides fordelivery of an approximately the same amount of gas at each hole. Aswill be readily understood, the pressure of the gas supply will begreater at hole 1l than at hole l2 because of the consumption of gas atl1. This increased size of hole tends to make the iiame uniformthroughout the burning point 8. The holes are drilled through theunderside of the tube near the burning point which provides for eachflame wrapping itself around the point when in use. lThis makes a veryeiiicient point, without a conducting or cooling surface. One hole isdrilled on the upper side near the burning point. It has been found out`that if the flames from these holes unite the heating effect is not sogreat, but the energy is consumed in light. If the holes are spaced sothat the zones of blue flames are just tangent, a more efficient tool isobtained. I therefore space my holes approximately inch apart which hasbeen found to give the best results.

I wish it distinctly understood that my pyrographical tool hereinillustrated and described, is in the form which I desire to constructit, and that any changes or variations may be made as may be convenientor desirable without departing from the salient features of my inventionand I therefore intend the following claims to cover such modificationas naturally fall within the lines of invention.

I-Iaving thus fully described my invention, what I claim as-new anddesire to secure by Letters Patent is,--

point.

l. A handle for a tool of the Class derlhis specification signed andwitnessed in scribed, niade of clay, provided with a hol- 911 Flat-IronBuilding, New York city, this 1U 10W core and adapted to securely holdin one seventeenth day of September, A. D., 1908.

end a burnin@ point- T 2. In a pfrographical tool, a burning HERBERT M'HOI OB' point provided with holes of several dianien In the presenceofters the largest beingnearest the burning EDWD. VAN VVINKLE,

MARGUERITE Ross.

